CN106246947B - The installation method of gate valve seat sealing ring - Google Patents
The installation method of gate valve seat sealing ring Download PDFInfo
- Publication number
- CN106246947B CN106246947B CN201610630747.4A CN201610630747A CN106246947B CN 106246947 B CN106246947 B CN 106246947B CN 201610630747 A CN201610630747 A CN 201610630747A CN 106246947 B CN106246947 B CN 106246947B
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- valve seat
- annular groove
- seat insert
- sealing ring
- insert
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K3/00—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing
- F16K3/30—Details
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Lining Or Joining Of Plastics Or The Like (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
Abstract
The invention discloses the installation method of gate valve seat sealing ring, it comprises the following steps：（1）, valve seat insert pretreatment：Valve seat insert is immersed in aviation kerosine 30 40min are preheated at 50 60 DEG C, then kept the temperature after being warming up to 80 90 DEG C with the speed of 46 DEG C/min；（2）, open up annular groove：The annular groove of valve seat insert can be accommodated by being opened up on valve seat；（3）, annular groove pretreatment：Rosin powder is inserted into annular groove；（4）, assembling valve seat insert：Valve seat insert is put into annular groove by being taken out in aviation kerosine；（5）, cooling processing：Dry ice is stacked in tape surface, adhesive tape is removed after dry ice volatilization.Enhance the cooperation intensity of valve seat insert and annular groove the beneficial effects of the invention are as follows one, two improve pressure-resistant, the corrosion resistance of valve seat insert, and three extend the service life of valve seat insert.
Description
Technical field
The present invention relates to valve manufacture field, more particularly to the installation method of gate valve seat sealing ring.
Background technology
Gate valve（gate valve）It is an opening and closing element flashboard, the direction of motion and flow direction of flashboard are perpendicular, gate valve
Can only make standard-sized sheet and fully closed, uncomfortable door parameter and it is different, be usually 5 °, when medium temperature is not high for 2 ° 52 '.Wedge Gate Valves
Flashboard can be integrally formed, and be called rigid flashboard；Can also make can produce the flashboard of micro-deformation, to improve its technique
Property, the deviation that sealing surface angle produces in process is made up, this flashboard is called flexible disc.When gate valve is closed, sealing
Face can rely only on pressure medium to seal, i.e., the sealing surface of flashboard is pressed to the valve seat of opposite side to ensure by pressure medium
The sealing of sealing surface, here it is self sealss.Most of gate valve when that is, valve is closed, will rely on external force using forced seal
Flashboard is pressed into valve seat by force, to ensure the leakproofness of sealing surface.The flashboard of gate valve is for linear motion with valve rod, is liter
Lever brake valve is dropped, is also Outside screw stem rising through handwheel type gate valve.Usually there is trapezoidal thread on elevating lever, by the nut and valve body of valve tip
Guide groove, rotary motion is changed into moving along a straight line, that is, operation torque is changed into operating thrust.During Open valve, when flashboard carries
Rise is equal to the 1 of valve latus rectum：At 1 times, the passage of fluid is completely unimpeded, but operationally, this position can not monitor.
In actual use, it is using the vertex of valve rod as mark, that is, motionless position is opened, as its fully open position.To consider temperature
There is deadlock phenomenon in change, usually on vertex position is reached, then refunds 1/2-1 circles, the position as standard-sized sheet valve.Therefore,
The fully open position of valve, is determined by position, that is, stroke of flashboard.Some gate valves, valve stem nut are located on flashboard, hand wheel rotating
Band ovable valve stem rotates, and lifts flashboard, and this valve is called swingle gate valve, or is inside screw nonrising stem type gate valve.Compression type in gate valve
Valve seat insert, is mainly made of valve seat, valve seat insert.Valve seat insert is soft close using PTFE, RPTFE, nylon, PEEK etc.
Closure material, valve seat insert radially process several exhausting-gas holes, and valve seat insert is pressed into valve seat by thrust.Valve seat is close
Seal baseplane produces local plastic deformation under the action of thrust, and is in close contact with valve seat slot bottom plane and realizes sealing.
But traditional compression type valve seat insert has two, first, valve seat and valve seat insert are flat seal, valve is put on
The thrust size of seat sealing ring depends on valve seat slot bottom plane and the roughness of valve seat insert baseplane, compares and is difficult to control
System, if thrust is too small, valve seat is easily leaked with valve seat insert seal pressure deficiency, fluid from contact site, if pressure
Clamp force is too big, and compression stress is too big, and serious deformation, conquassation valve seat insert when serious occur for valve seat insert.Second, it is pressurized
The influence of power and temperature, valve seat is easily loose with valve seat insert contact stress, and fluid is easily leaked from contact site.
Chinese utility model application CN201220415354.9 discloses a kind of embedded valve seat sealing ring, valve seat slot bottom
Toothed surface equipped with several protrusions, valve seat are radially provided with exhausting-gas hole, a sealing ring inserted valve seat slot bottom, and with slot bottom toothed surface
It is in close contact and realizes sealing.The advantages of utility model is that valve seat insert and the toothed surface of some protrusions of valve seat slot bottom closely connect
Touch and realize sealing；Valve seat insert will not deform；During pressure, temperature variation, the toothed surface and valve seat of some protrusions of valve seat slot bottom
Sealing ring baseplane is fitted close due to embedded, and contact stress will not occur loose, and fluid will not leak.But there are valve for the program
Seat sealing ring is fitted close by slot bottom toothed surface and valve seat slot bottom, and stress point is small, and footprint pressure is big, it is easy to close to valve seat
Seal causes to damage, and when pressure, temperature variation is produced, the destruction of bigger can be caused to valve seat insert.It is close to shorten valve seat
The service life of seal.
The content of the invention
The technical problem to be solved in the present invention is existing valve seat insert installation method to cause valve seat insert easily damaged,
Shorten the service life of valve seat insert, a kind of installation method of gate valve seat sealing ring is provided for this.
The technical scheme is that：The installation method of gate valve seat sealing ring, it comprises the following steps：（1）, valve seat it is close
Seal pre-processes：Valve seat insert is immersed in aviation kerosine 30-40min is preheated at 50-60 DEG C, then with 4-6 DEG C/min's
Speed is kept the temperature after being warming up to 80-90 DEG C；（2）, open up annular groove：The annular groove of valve seat insert can be accommodated by being opened up on valve seat,
The longitudinal section of the annular groove is in up-small and down-big T-shaped；（3）, annular groove pretreatment：Rosin powder is inserted into annular groove, it is right
Annular groove carries out heating heating and causes rosin powder in molten state and be full of the 1/3-2/3 of annular groove volume, the heating heating
It is to be warming up to 120-130 DEG C with the speed of 6-8 DEG C/min；（4）, assembling valve seat insert：By valve seat insert by aviation kerosine
Middle taking-up is put into annular groove, and closed processes, seal time 10-20min are carried out to annular groove with adhesive tape；（5）, at cooling
Reason：Dry ice is stacked in tape surface, adhesive tape is removed after dry ice volatilization.
The improvement of such scheme is the step（3）It is 1 to be inserted after annular groove pretreatment with rosin powder mass ratio:10-
15 titania powder.
Valve seat insert described in such scheme is NR natural rubber sealing rings.
The beneficial effects of the invention are as follows being pre-processed to valve base sealing collar member, strengthen its thermoplasticity, after being fitted into T-shaped annular groove
Make its expansion using rosin to be heated to it, it is ensured that the collocation degree of valve seat insert and T-shaped annular groove, finally carries out cooling processing
Make valve seat insert condensation shaping, one enhances the cooperation intensity of valve seat insert and annular groove, and two is close to improve valve seat
Pressure-resistant, the corrosion resistance of seal, three extend the service life of valve seat insert.
Embodiment
The installation method of gate valve seat sealing ring, it comprises the following steps：（1）, valve seat insert pretreatment：Valve seat is close
Seal is immersed in aviation kerosine preheats 30-40min at 50-60 DEG C, then after being warming up to 80-90 DEG C with the speed of 4-6 DEG C/min
Insulation；（2）, open up annular groove：The annular groove of valve seat insert can be accommodated by being opened up on valve seat, and the longitudinal section of the annular groove is in
Up-small and down-big is T-shaped；（3）, annular groove pretreatment：Rosin powder is inserted into annular groove, heating heating is carried out to annular groove to be made
Rosin powder is obtained in molten state and the 1/3-2/3 full of annular groove volume, the heating heating are the speed liters with 6-8 DEG C/min
Temperature is to 120-130 DEG C；（4）, assembling valve seat insert：Valve seat insert is put into annular groove by being taken out in aviation kerosine, is used
Adhesive tape carries out closed processes, seal time 10-20min to annular groove；（5）, cooling processing：Dry ice is stacked in tape surface,
Adhesive tape is removed after dry ice volatilization.
With reference to embodiment, the present invention will be further described.
Embodiment 1：The installation method of gate valve seat sealing ring, it comprises the following steps：（1）, valve seat insert pretreatment：
NR natural rubbers sealing ring is immersed in aviation kerosine 30min is preheated at 50 DEG C, then 80 DEG C are warming up to the speed of 4 DEG C/min
After keep the temperature；（2）, open up annular groove：The annular groove of NR natural rubber sealing rings can be accommodated by being opened up on valve seat, the annular groove
Longitudinal section is in up-small and down-big T-shaped；（3）, annular groove pretreatment：Rosin powder is inserted into annular groove, annular groove is risen
So that rosin powder is in molten state and is full of the 1/3 of annular groove volume, the heating heating is with the speed of 6 DEG C/min for temperature heating
It is warming up to 120 DEG C；（4）, assembling valve seat insert：NR natural rubbers sealing ring is put into annular groove by being taken out in aviation kerosine
It is interior, closed processes, seal time 10min are carried out to annular groove with adhesive tape；（5）, cooling processing：It is allowed to dry in tape surface heap
Ice, adhesive tape is removed after dry ice volatilization.
Embodiment 2：The installation method of gate valve seat sealing ring, it comprises the following steps：（1）, valve seat insert pretreatment：
NR natural rubbers sealing ring is immersed in aviation kerosine 35min is preheated at 55 DEG C, then 85 DEG C are warming up to the speed of 5 DEG C/min
After keep the temperature；（2）, open up annular groove：The annular groove of NR natural rubber sealing rings can be accommodated by being opened up on valve seat, the annular groove
Longitudinal section is in up-small and down-big T-shaped；（3）, annular groove pretreatment：Rosin powder is inserted into annular groove, annular groove is risen
So that rosin powder is in molten state and is full of the 1/2 of annular groove volume, the heating heating is with the speed of 7 DEG C/min for temperature heating
It is warming up to 125 DEG C；（4）, assembling valve seat insert：NR natural rubbers sealing ring is put into annular groove by being taken out in aviation kerosine
It is interior, closed processes, seal time 15min are carried out to annular groove with adhesive tape；（5）, cooling processing：It is allowed to dry in tape surface heap
Ice, adhesive tape is removed after dry ice volatilization.
Embodiment 3：The installation method of gate valve seat sealing ring, it comprises the following steps：（1）, valve seat insert pretreatment：
NR natural rubbers sealing ring is immersed in aviation kerosine 40min is preheated at 60 DEG C, then 90 DEG C are warming up to the speed of 6 DEG C/min
After keep the temperature；（2）, open up annular groove：The annular groove of NR natural rubber sealing rings can be accommodated by being opened up on valve seat, the annular groove
Longitudinal section is in up-small and down-big T-shaped；（3）, annular groove pretreatment：Rosin powder is inserted into annular groove, annular groove is risen
So that rosin powder is in molten state and is full of the 2/3 of annular groove volume, the heating heating is with the speed of 8 DEG C/min for temperature heating
It is warming up to 130 DEG C；（4）, assembling valve seat insert：NR natural rubbers sealing ring is put into annular groove by being taken out in aviation kerosine
It is interior, closed processes, seal time 20min are carried out to annular groove with adhesive tape；（5）, cooling processing：It is allowed to dry in tape surface heap
Ice, adhesive tape is removed after dry ice volatilization.
NR natural rubbers sealing ring that the present invention uses tool has good wearability, elasticity, breaking strength and elongation, but
Easy to aging in atmosphere, heat becomes glutinous, it is entered the pre-heat treatment in aviation kerosine using the characteristic is existing, makes its softening without old
Change, received after it is put into annular groove persistently overheating after the heat transfer of rosin and send expansion, make its bottom and annular groove
Bottom is adapted to, and forms up-small and down-big T-type structure, and the volume of rosin filling annular groove was not easy as low as to be less than 1/3, and otherwise could
The full cladding of side coil is carried out to valve seat insert, is not easy to excessive more than 2/3, otherwise rosin can overflow, and influence subsequent handling
Progress.The speed of heating heating is careful to control, and heating is too fast or can all influence the moulding process of valve seat insert slowly excessively.Step
Suddenly（5）Cooling utilize dry ice, make its produce cold passed to by adhesive tape in annular groove, make heated valve seat insert with
Rosin is combined closely and hardened forming, obtains final finished.
The preferred embodiment of the present invention 4 is step（3）It is 1 to be inserted after annular groove pretreatment with rosin powder mass ratio:10
Titania powder, preferred embodiment 5 is step（3）It is 1 to be inserted after annular groove pretreatment with rosin powder mass ratio:15
Titania powder, filling titania powder can be used as stabilizer, when pressure, temperature variation valve seat insert be had
There is certain resistance, while titanium dioxide can improve the wear-resisting property of valve seat insert, valve seat insert is born larger
Frictional force, extend service life of valve seat insert.
Claims (3)
1. the installation method of gate valve seat sealing ring, it is characterized in that it comprises the following steps：（1）, valve seat insert pretreatment：Will
Valve seat insert is immersed in aviation kerosine preheats 30-40min at 50-60 DEG C, then is warming up to 80- with the speed of 4-6 DEG C/min
Kept the temperature after 90 DEG C；（2）, open up annular groove：The annular groove of valve seat insert can be accommodated by being opened up on valve seat, and the annular groove is indulged
Section is in up-small and down-big T-shaped；（3）, annular groove pretreatment：Rosin powder is inserted into annular groove, is heated up to annular groove
So that rosin powder is in molten state and is full of the 1/3-2/3 of annular groove volume, the heating heating is with 6-8 DEG C/min for heating
Speed is warming up to 120-130 DEG C；（4）, assembling valve seat insert：Valve seat insert is put into annular groove by being taken out in aviation kerosine
It is interior, closed processes, seal time 10-20min are carried out to annular groove with adhesive tape；（5）, cooling processing：Stacked in tape surface
Dry ice, adhesive tape is removed after dry ice volatilization.
2. the installation method of gate valve seat sealing ring as claimed in claim 1, it is characterized in that the step（3）Annular groove is located in advance
It is 1 to be inserted after reason with rosin powder mass ratio:The titania powder of 10-15.
3. the installation method of gate valve seat sealing ring as claimed in claim 1 or 2, it is characterized in that the valve seat insert is NR
Natural rubber sealing ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610630747.4A CN106246947B (en) | 2016-08-04 | 2016-08-04 | The installation method of gate valve seat sealing ring |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610630747.4A CN106246947B (en) | 2016-08-04 | 2016-08-04 | The installation method of gate valve seat sealing ring |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106246947A CN106246947A (en) | 2016-12-21 |
| CN106246947B true CN106246947B (en) | 2018-04-13 |
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ID=58077439
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610630747.4A Active CN106246947B (en) | 2016-08-04 | 2016-08-04 | The installation method of gate valve seat sealing ring |
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| Country | Link |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4623122A (en) * | 1985-06-19 | 1986-11-18 | Itt Corporation | Valve with improved seal |
| US5062194A (en) * | 1990-11-13 | 1991-11-05 | General Motors Corporation | Method for installing O-ring seals |
| CN1788937A (en) * | 2005-12-02 | 2006-06-21 | 西南石油学院 | YX shaped polyurethane collar seal mounting process |
| CN102549255A (en) * | 2009-10-14 | 2012-07-04 | 罗伯特·博世有限公司 | Method for installing a sealing ring |
| CN103317336A (en) * | 2013-07-17 | 2013-09-25 | 台州联方机电科技有限公司 | Automatic assembly device and method of O-type sealing ring |
| CN104626049A (en) * | 2014-12-15 | 2015-05-20 | 贵州红林机械有限公司 | Method and device for assembling lining with multiple rubber sealing rings into multi-slot shell |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0833182B2 (en) * | 1990-06-29 | 1996-03-29 | 日本ラインツ株式会社 | Seal ring and how to assemble it |
| JP4222241B2 (en) * | 2003-07-18 | 2009-02-12 | 日産自動車株式会社 | Ring component mounting device |
-
2016
- 2016-08-04 CN CN201610630747.4A patent/CN106246947B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4623122A (en) * | 1985-06-19 | 1986-11-18 | Itt Corporation | Valve with improved seal |
| US5062194A (en) * | 1990-11-13 | 1991-11-05 | General Motors Corporation | Method for installing O-ring seals |
| CN1788937A (en) * | 2005-12-02 | 2006-06-21 | 西南石油学院 | YX shaped polyurethane collar seal mounting process |
| CN102549255A (en) * | 2009-10-14 | 2012-07-04 | 罗伯特·博世有限公司 | Method for installing a sealing ring |
| CN103317336A (en) * | 2013-07-17 | 2013-09-25 | 台州联方机电科技有限公司 | Automatic assembly device and method of O-type sealing ring |
| CN104626049A (en) * | 2014-12-15 | 2015-05-20 | 贵州红林机械有限公司 | Method and device for assembling lining with multiple rubber sealing rings into multi-slot shell |
Non-Patent Citations (1)
| Title |
|---|
| 《组合密封圈安装的快捷方法》;曹维超;《材料•工艺•设备》;20101231(第4期);88-89 * |
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| CN106246947A (en) | 2016-12-21 |
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